Gary Rideway Kill Count: 48 This guy is a real ray of sunshine. Gary worked in a truck factory but moonlighted as a prostitute killing necrophiliac. While he was only convicted of 48 murders, he confessed to over twice that many. Gary would go back and have sex with the corpses, which is what finally got him caught after police discovered his DNA on the dead bodies. He was spared the death penalty because he disclosed where his missing victims were.